#pragma once

#include <reanimated/CSS/easing/EasingConfigs.h>

#include <folly/dynamic.h>
#include <jsi/jsi.h>

#include <array>
#include <optional>
#include <string>
#include <string_view>
#include <utility>
#include <variant>

namespace reanimated::css {

/// The value kinds the platform can animate natively: scalars, sizes, and RGBA
/// colors (normalized to [0, 1]).
using PlatformValue = std::variant<double, std::array<double, 2>, std::array<double, 4>>;

#ifdef ANDROID
/// Properties the Android backend animates natively; the index is the id the JNI seam
/// carries and cssPropertyWriterFor switches on. A new one also needs a traitsFor() entry
/// in platform.cpp and a writer, or its endpoints never parse and it stays on the loop.
/// borderWidth affects layout, so it stays on the loop; the writer declines shadowColor
/// below API 28.
inline constexpr std::array<std::string_view, 5> kAndroidPlatformProperties{
    "opacity",
    "backgroundColor",
    "borderColor",
    "borderRadius",
    "shadowColor",
};
#endif // ANDROID

/// Whether parsePlatformValues knows the property (value kind and CSS default).
bool hasPlatformValueTraits(const std::string &propertyName);

std::optional<PlatformValue> lerpPlatformValues(const PlatformValue &from, const PlatformValue &to, double progress);

/// Packs normalized [r, g, b, a] into the ARGB int RN's processColor commits.
double packColorChannels(const std::array<double, 4> &channels);

/// The value in the form the C++ loop takes: a number for scalars and colors,
/// `{width, height}` for sizes. The jsi::Value form feeds the config path, the
/// folly::dynamic form the pseudo-selector diffs.
facebook::jsi::Value platformValueToJSI(facebook::jsi::Runtime &rt, const PlatformValue &value);
folly::dynamic platformValueToDynamic(const PlatformValue &value);

/// Parses a transition's endpoints, looking the property up once. Null/undefined
/// falls back to its CSS default; nullopt means the platform can't express the
/// pair, so it runs on the loop. jsi::Value is the config path, folly::dynamic the
/// pseudo-selector toggle path.
using PlatformValuePair = std::pair<PlatformValue, PlatformValue>;

std::optional<PlatformValuePair> parsePlatformValues(
    facebook::jsi::Runtime &rt,
    const std::string &propertyName,
    const facebook::jsi::Value &fromValue,
    const facebook::jsi::Value &toValue);
std::optional<PlatformValuePair>
parsePlatformValues(const std::string &propertyName, const folly::dynamic &fromValue, const folly::dynamic &toValue);

} // namespace reanimated::css